/*
 * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package java.sql;

/**
 * <P>An exception that provides information on  database access
 * warnings. Warnings are silently chained to the object whose method
 * caused it to be reported.
 * <P>
 * Warnings may be retrieved from <code>Connection</code>, <code>Statement</code>,
 * and <code>ResultSet</code> objects.  Trying to retrieve a warning on a
 * connection after it has been closed will cause an exception to be thrown.
 * Similarly, trying to retrieve a warning on a statement after it has been
 * closed or on a result set after it has been closed will cause
 * an exception to be thrown. Note that closing a statement also
 * closes a result set that it might have produced.
 *
 * @see Connection#getWarnings
 * @see Statement#getWarnings
 * @see ResultSet#getWarnings
 */
public class SQLWarning extends SQLException {

  /**
   * Constructs a  <code>SQLWarning</code> object
   * with a given <code>reason</code>, <code>SQLState</code>  and
   * <code>vendorCode</code>.
   *
   * The <code>cause</code> is not initialized, and may subsequently be
   * initialized by a call to the
   * {@link Throwable#initCause(java.lang.Throwable)} method.
   * <p>
   *
   * @param reason a description of the warning
   * @param SQLState an XOPEN or SQL:2003 code identifying the warning
   * @param vendorCode a database vendor-specific warning code
   */
  public SQLWarning(String reason, String SQLState, int vendorCode) {
    super(reason, SQLState, vendorCode);
    DriverManager.println("SQLWarning: reason(" + reason +
        ") SQLState(" + SQLState +
        ") vendor code(" + vendorCode + ")");
  }


  /**
   * Constructs a <code>SQLWarning</code> object
   * with a given <code>reason</code> and <code>SQLState</code>.
   *
   * The <code>cause</code> is not initialized, and may subsequently be
   * initialized by a call to the
   * {@link Throwable#initCause(java.lang.Throwable)} method. The vendor code
   * is initialized to 0.
   * <p>
   *
   * @param reason a description of the warning
   * @param SQLState an XOPEN or SQL:2003 code identifying the warning
   */
  public SQLWarning(String reason, String SQLState) {
    super(reason, SQLState);
    DriverManager.println("SQLWarning: reason(" + reason +
        ") SQLState(" + SQLState + ")");
  }

  /**
   * Constructs a <code>SQLWarning</code> object
   * with a given <code>reason</code>. The <code>SQLState</code>
   * is initialized to <code>null</code> and the vendor code is initialized
   * to 0.
   *
   * The <code>cause</code> is not initialized, and may subsequently be
   * initialized by a call to the
   * {@link Throwable#initCause(java.lang.Throwable)} method.
   * <p>
   *
   * @param reason a description of the warning
   */
  public SQLWarning(String reason) {
    super(reason);
    DriverManager.println("SQLWarning: reason(" + reason + ")");
  }

  /**
   * Constructs a  <code>SQLWarning</code> object.
   * The <code>reason</code>, <code>SQLState</code> are initialized
   * to <code>null</code> and the vendor code is initialized to 0.
   *
   * The <code>cause</code> is not initialized, and may subsequently be
   * initialized by a call to the
   * {@link Throwable#initCause(java.lang.Throwable)} method.
   */
  public SQLWarning() {
    super();
    DriverManager.println("SQLWarning: ");
  }

  /**
   * Constructs a <code>SQLWarning</code> object
   * with a given  <code>cause</code>.
   * The <code>SQLState</code> is initialized
   * to <code>null</code> and the vendor code is initialized to 0.
   * The <code>reason</code>  is initialized to <code>null</code> if
   * <code>cause==null</code> or to <code>cause.toString()</code> if
   * <code>cause!=null</code>.
   * <p>
   *
   * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later
   * retrieval by the <code>getCause()</code> method); may be null indicating the cause is
   * non-existent or unknown.
   */
  public SQLWarning(Throwable cause) {
    super(cause);
    DriverManager.println("SQLWarning");
  }

  /**
   * Constructs a <code>SQLWarning</code> object
   * with a given
   * <code>reason</code> and  <code>cause</code>.
   * The <code>SQLState</code> is  initialized to <code>null</code>
   * and the vendor code is initialized to 0.
   * <p>
   *
   * @param reason a description of the warning
   * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later
   * retrieval by the <code>getCause()</code> method); may be null indicating the cause is
   * non-existent or unknown.
   */
  public SQLWarning(String reason, Throwable cause) {
    super(reason, cause);
    DriverManager.println("SQLWarning : reason(" + reason + ")");
  }

  /**
   * Constructs a <code>SQLWarning</code> object
   * with a given
   * <code>reason</code>, <code>SQLState</code> and  <code>cause</code>.
   * The vendor code is initialized to 0.
   * <p>
   *
   * @param reason a description of the warning
   * @param SQLState an XOPEN or SQL:2003 code identifying the warning
   * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later
   * retrieval by the <code>getCause()</code> method); may be null indicating the cause is
   * non-existent or unknown.
   */
  public SQLWarning(String reason, String SQLState, Throwable cause) {
    super(reason, SQLState, cause);
    DriverManager.println("SQLWarning: reason(" + reason +
        ") SQLState(" + SQLState + ")");
  }

  /**
   * Constructs a<code>SQLWarning</code> object
   * with a given
   * <code>reason</code>, <code>SQLState</code>, <code>vendorCode</code>
   * and  <code>cause</code>.
   * <p>
   *
   * @param reason a description of the warning
   * @param SQLState an XOPEN or SQL:2003 code identifying the warning
   * @param vendorCode a database vendor-specific warning code
   * @param cause the underlying reason for this <code>SQLWarning</code> (which is saved for later
   * retrieval by the <code>getCause()</code> method); may be null indicating the cause is
   * non-existent or unknown.
   */
  public SQLWarning(String reason, String SQLState, int vendorCode, Throwable cause) {
    super(reason, SQLState, vendorCode, cause);
    DriverManager.println("SQLWarning: reason(" + reason +
        ") SQLState(" + SQLState +
        ") vendor code(" + vendorCode + ")");

  }

  /**
   * Retrieves the warning chained to this <code>SQLWarning</code> object by
   * <code>setNextWarning</code>.
   *
   * @return the next <code>SQLException</code> in the chain; <code>null</code> if none
   * @see #setNextWarning
   */
  public SQLWarning getNextWarning() {
    try {
      return ((SQLWarning) getNextException());
    } catch (ClassCastException ex) {
      // The chained value isn't a SQLWarning.
      // This is a programming error by whoever added it to
      // the SQLWarning chain.  We throw a Java "Error".
      throw new Error("SQLWarning chain holds value that is not a SQLWarning");
    }
  }

  /**
   * Adds a <code>SQLWarning</code> object to the end of the chain.
   *
   * @param w the new end of the <code>SQLException</code> chain
   * @see #getNextWarning
   */
  public void setNextWarning(SQLWarning w) {
    setNextException(w);
  }

  private static final long serialVersionUID = 3917336774604784856L;
}
